11th Class Statistics MCQS Chapter 7

A random variable is also called.

Discrete variable

Both A and B

Stochastic variable

Chance variable

For a constant k, the variance of k is

zero

k

k²

none of these

If x is a random variable with E(x) = 5 then E(3x – 2) =

1

0

13

All of them

E(x) = ?xf(x) if it ________ absolutely.

Discrete

Equal

None of these

Converges

If the random variable x denotes the number of heads when three distinct coins are tossed, the x assumes values

1, 3, 3, 1

0, 1, 2, 3

None of these

1, 2, 3